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Ultima descărcare din IBN: 2023-09-13 15:39 |
SM ISO690:2012 ARION, Vladimir, RAPTA, Peter, TELSER, Joshua, SHOVA, Sergiu, BREZA, Martin, LUSPAI, Karol, KOZISEK, Jozef. Syntheses, electronic structures, and EPR/UV-Vis-NIR spectroelectrochemistry of nickel(II), copper(II), and zinc(II) complexes with a tetradentate ligand based on S-methylisothiosemicarbazide. In: Inorganic Chemistry, 2011, vol. 50, pp. 2918- 2931. ISSN 0020-1669. DOI: https://doi.org/10.1021/ic102277v |
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Inorganic Chemistry | ||||||
Volumul 50 / 2011 / ISSN 0020-1669 | ||||||
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DOI:https://doi.org/10.1021/ic102277v | ||||||
Pag. 2918- 2931 | ||||||
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Template condensation of 3,5-di-tert-butyl-2-hydroxybenzaldehyde S-methylisothiosemicarbazone with pentane-2,4-dione and triethyl orthoformate at elevated temperatures resulted in metal complexes of the type MIIL, where M = Ni and Cu and H2L = a novel tetradentate ligand. These complexes are relevant to the active site of the copper enzymes galactose oxidase and glyoxal oxidase. Demetalation of NiIIL with gaseous hydrogen chloride in chloroform afforded the metal-free ligand H2L. Then by the reaction of H2L with Zn(CH3COO) 2•2H2O in a 1:1 molar ratio in 1:2 chloroform/methanol, the complex ZnIIL(CH3OH) was prepared. The three metal complexes and the prepared ligand were characterized by spectroscopic methods (IR, UV-vis, and NMR spectroscopy), X-ray crystallography, and DFT calculations. Electrochemically generated one-electron oxidized metal complexes [NiL]+, [CuL]+, and [ZnL(CH 3OH)]+ and the metal-free ligand cation radical [H 2L]+• were studied by EPR/UV-vis-NIR and DFT calculations. These studies demonstrated the interaction between the metal ion and the phenoxyl radical. |
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Cuvinte-cheie MeSH Copper, Electron spin resonance spectroscopy, Electrons, ligands, Molecular Conformation, molecular structure, nickel, Organometallic Compounds, Quantum theory, spectrophotometry, Ultraviolet, spectroscopy, near-infrared, Stereoisomerism, Thiosemicarbazones, Zinc EMTREE drug terms copper, Ligand, nickel, organometallic compound, thiosemicarbazone derivative, zinc EMTREE medical terms article, chemical structure, Chemistry, conformation, electron, electron spin resonance, near infrared spectroscopy, Quantum theory, Stereoisomerism, synthesis, ultraviolet spectrophotometry |
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